package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.AttrConverter;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVO;
import com.atguigu.gulimall.product.vo.AttrVO;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;

import java.util.*;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;


@Service("attrService")
@Slf4j
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Autowired
    AttrAttrgroupRelationDao relationDao;

    @Autowired
    AttrGroupDao attrGroupDao;

    @Autowired
    CategoryDao categoryDao;

    @Autowired
    CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW, rollbackFor = {Exception.class})
    @Override
    public void saveAttr(AttrVO attrVO) {
        // 1.首先保存pms_attr表  商品属性表
        // 这里使用对象拷贝  BeanUtils.copyProperties() 对比 mapstruct
        // 拷贝简单对象的时候是深拷贝
        // 拷贝复杂对象的时候(对象属性里持有对象)是浅拷贝
        // BeanUtils.copyProperties(attrVO,attrEntity);
        // BeanUtils.copyProperties() VS mapstruct 性能对比  mapstruct性能更高，相差33倍左右
        AttrEntity attrEntity = AttrConverter.INSTANCE.copyProperties(attrVO);
        this.save(attrEntity);

        // 2.保存关联关系
        if(attrVO.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attrVO.getAttrGroupId()!=null) {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attrVO.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationDao.insert(relationEntity);
        }

    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        // 根据type判断是查询基本属性还是销售属性
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().
                eq("attr_type","base".equalsIgnoreCase(type)?ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode():ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());

        if(catelogId != 0){
            // 查询所有的分类
            queryWrapper.lambda().
                    eq(AttrEntity::getCatelogId,catelogId);
        }

        // 检索条件
        String key = (String) params.get("key");
        log.info("檢索條件key={}",key);
        if(StringUtils.isNotBlank(key) && !"null".equals(key)){
            // attr_id attr_name
            queryWrapper.lambda().
                    eq(AttrEntity::getAttrId,key).
                    or().like(AttrEntity::getAttrName,key);
        }

        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper
        );
        PageUtils pageUtils = new PageUtils(page);
        List<AttrEntity> records = page.getRecords();

        List<AttrRespVO> respVos = records.stream().map(attrEntity -> {

            AttrRespVO attrRespVo = new AttrRespVO();
            attrRespVo =  AttrConverter.INSTANCE.EntityToAttrRespVo(attrEntity);

            //1、设置分类和分组的名字
            if("base".equalsIgnoreCase(type)) {
                AttrAttrgroupRelationEntity attrId = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().lambda().
                                eq(AttrAttrgroupRelationEntity::getAttrId, attrEntity.getAttrId()));

                if (attrId != null && attrId.getAttrGroupId() != null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrId.getAttrGroupId());
                    if (StringUtils.isNotBlank(attrGroupEntity.getAttrGroupName())) {
                        attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                    }
                }
            }

            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null && StringUtils.isNotBlank(categoryEntity.getName())) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());

        pageUtils.setList(respVos);
        return pageUtils;
    }

    @Cacheable(value = "attr",key = "'attrinfo:+#root.args[0]'")
    @Override
    public AttrRespVO getAttrInfo(Long attrId) {
        AttrRespVO respVO = new AttrRespVO();
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity,respVO);

        // 1.设置分组信息
        AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = relationDao.selectOne(
                new QueryWrapper<AttrAttrgroupRelationEntity>().
                        lambda().eq(AttrAttrgroupRelationEntity::getAttrId,attrId));
        if(null != attrAttrgroupRelationEntity && attrAttrgroupRelationEntity.getAttrGroupId() != null){
            respVO.setAttrGroupId(attrAttrgroupRelationEntity.getAttrGroupId());

            AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrAttrgroupRelationEntity.getAttrGroupId());
            if(null != attrGroupEntity && StringUtils.isNotBlank(attrGroupEntity.getAttrGroupName())){
                respVO.setGroupName(attrGroupEntity.getAttrGroupName());
            }
        }

        // 2、查询分类信息
        // 根据分类id查询分类的路径
        Long[] catelogPath = categoryService.findCatelogPath(attrEntity.getCatelogId());
        respVO.setCatelogPath(catelogPath);
        // 查询分类名
        CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
        if(null != categoryEntity && StringUtils.isNotBlank(categoryEntity.getName())){
            respVO.setCatelogName(categoryEntity.getName());
        }

        return respVO;
    }

    @Override
    public void updateAttr(AttrVO attr) {
        // 基本数据进行维护
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr,attrEntity);
        this.updateById(attrEntity);

        if(attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
            //1、修改分组关联
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();

            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attr.getAttrId());

            Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            if(count>0){

                relationDao.update(relationEntity,new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",attr.getAttrId()));

            }else{
                relationDao.insert(relationEntity);
            }
        }


    }

    /**
     * 根据分组id查找关联的所有基本属性
     * @author fd
     * @date 2021/5/16 22:05
     * @param attrgroupId
     * @return java.util.List<com.atguigu.gulimall.product.entity.AttrEntity>
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        List<AttrAttrgroupRelationEntity> entities = relationDao.selectList(
                new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));

        List<Long> attrIds = entities.stream().map((attr) -> {
            return attr.getAttrId();
        }).collect(Collectors.toList());

        if(attrIds == null || attrIds.size() == 0){
            return null;
        }
        Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
        return (List<AttrEntity>) attrEntities;
    }

    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
        //relationDao.delete(new QueryWrapper<>().eq("attr_id",1L).eq("attr_group_id",1L));
        List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());
        relationDao.deleteBatchRelation(entities);
    }

    /**
     * 获取当前分组没有关联的所有属性
     * @author fd
     * @date 2021/5/17 21:27
     * @param attrgroupId
     * @param params
     * @return com.atguigu.common.utils.PageUtils
     */
    @Override
    public PageUtils getNoRelationAttr(Long attrgroupId, Map<String, Object> params) {
        //1、当前分组只能关联自己所属的分类里面的所有属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();
        //2、当前分组只能关联别的分组没有引用的属性
        //2.1)、当前分类下的其他分组
        List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().
                eq("catelog_id", catelogId));
        List<Long> collect = group.stream().map(item -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());

        //2.2)、这些分组关联的属性
        List<AttrAttrgroupRelationEntity> groupId = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().
                in("attr_group_id", collect));
        List<Long> attrIds = groupId.stream().map(item -> {
            return item.getAttrId();
        }).collect(Collectors.toList());

        //2.3)、从当前分类的所有属性中移除这些属性；
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>().
                eq("catelog_id", catelogId).
                eq("attr_type",ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
        if(attrIds!=null && attrIds.size()>0){
            wrapper.notIn("attr_id", attrIds);
        }
        String key = (String) params.get("key");
        if(!StringUtils.isEmpty(key)){
            wrapper.and((w)->{
                w.eq("attr_id",key).or().like("attr_name",key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);

        PageUtils pageUtils = new PageUtils(page);

        return pageUtils;
    }

	@Override
	public List<Long> selectSearchAttrs(List<Long> attrIds) {

        // SELECT attr_id FROM `pms_attr`  where attr_id IN (?) AND search_type = 1
		return baseMapper.selectSearchAttrIds(attrIds);
	}

}